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MariettaO [177]
3 years ago
15

The sum of the digits of a two-digit number is 13. Twice the first digit is 1 less than the second digit. What is the two digit

number. Create a system of equations and solve.
Mathematics
1 answer:
Alex3 years ago
4 0

Answer:

6 and 7

Step-by-step explanation:

10(13-X) + X= 13-9X. 3×2=6. 7-6=1. 7+6=13

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192=6000(.02(8/5-4Y)+.08y)<br> solve for y
Katena32 [7]

Given:

The equation is:

192=6000\left(0.02\left(\dfrac{8}{5}-4y\right)+0.08y\right)

To find:

The value of y.

Solution:

We have,

192=6000\left(0.02\left(\dfrac{8}{5}-4y\right)+0.08y\right)

On simplification, we get

192=6000\left(0.02\times 1.6-0.02\times 4y+0.08y\right)

192=6000\left(0.032-0.08y+0.08y\right)

192=6000\left(0.032\right)

192=192

Since LHS=RHS and the equation is free from the variable y, therefore the given equation is true for all real values of y.

Hence, all real values of y are solutions.

7 0
3 years ago
1. What is the equation of the vertical line that passes through the point (3, 4)?
Natasha_Volkova [10]

Answer:

1. the Equation of vertical line=> x=3

2. the Equation of horizontal line

=> y = 4

5 0
3 years ago
What is the volume of a sphere with a radius of 9 inches
Effectus [21]
Given the formula 
V=\frac{4}{3}πR³
so V=\frac{4}{3}π9³=972π
7 0
3 years ago
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Hey need help on these NEED HELP ASAP
GalinKa [24]

Answer:

first one : (7+12+3+4+4+8)*2=76

8 0
3 years ago
Juan had 8 points in a trivia game he answered 3 more questions correctly for 2 points
Vlada [557]

Answer:

It's 14 pts total.

Step-by-step explanation:

He started out with 8. Then he answered 3 more questions that were 2 pts each. If you do 3x2, that would =6. Add 6 and 8, and you get 14!

6 0
3 years ago
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